Economy 4 sensor complete system with buzzer 3 stages of audible beep to indicate distance 4 sensor system with 18.8mm unpainted sensors (black finish) Can be used as a 2-sensor system All-weather design (-40C to 85C) Detachable sensor with waterproof wire connector 7.5 foot sensor leads designed for trunk mounted installation Includes hole saw and installation kit For Metal Bumper Installations you must order part# PSBMDRB
